Quick verdict

Square Point of Sale is a strong starting point for a small UK business that wants one system for taking payments, recording sales and managing a modest product list without signing a long software contract. The core POS app costs £0 a month. Square charges 1.75% for in-person UK-card payments, and its Reader starts at £19 plus VAT.

The word “free” needs context. Hardware, payment processing and optional software still cost money. A retailer, restaurant or appointment business may eventually need a paid Square plan or add-ons for advanced stock, staff, kitchen or loyalty functions. Square says its Plus plans start at £29 a month and can be cancelled at any time.

Square is easiest to recommend to a new or seasonal business that values fast setup and predictable card-present pricing. A high-turnover shop should compare a negotiated merchant-services quote because a small reduction in the percentage fee can outweigh the convenience of free software.

Square POS pricing at a glance

The official Square POS pricing page and general UK pricing page were checked on 11 September 2026.

Square says businesses processing more than £200,000 in annual card sales can ask about custom processing and hardware prices. That threshold is an invitation to negotiate, not a guarantee of a better rate.

What the free POS actually includes

The free Square Point of Sale app covers the basics many sole traders need: a product catalogue, checkout, sales reporting, customer records, digital receipts, refunds and payment acceptance. You can also use cash as a tender type, although Square obviously does not process or charge for the cash itself.

This can replace a handwritten sales book for a market stall, mobile service business or small counter. It can also support a simple café menu. The value is not just taking a card. Each payment is attached to an item, tax setting and staff action, giving the owner a cleaner daily total.

Free does not mean every workflow is included. Test variants, modifiers, stock counts, purchase orders, multi-location returns, staff permissions and detailed labour reporting. A five-item coffee menu is very different from a clothing shop with hundreds of colour and size combinations.

Hardware choices

Square sells several levels of hardware. Current list prices can be promotional, so use the checkout price on the day you buy.

Do not compare purchase prices alone. The Reader uses your phone or tablet, battery and data connection. The Stand needs a compatible iPad. A till may also need a printer, cash drawer, barcode scanner and network equipment. Write a complete hardware list before comparing it with a rented EPOS package.

Worked monthly cost for a small shop

Assume a shop takes £8,000 a month through UK cards, all in person, using the free POS plan and a Square Reader.

• Processing: £8,000 × 1.75% = £140 a month.
• POS subscription: £0.
• Reader: £19 plus VAT once, excluding any phone or tablet.
• Annual processing at the same turnover: £140 × 12 = £1,680.

Now suppose another provider quotes 1.2% plus £20 monthly terminal rental, with no other charges, on the same £8,000:

• Processing: £8,000 × 1.2% = £96.
• Rental: £20.
• Total: £116 a month.

The quote is £24 cheaper in this simplified example. Over a year that is £288, before setup, PCI, minimum service, authorisation, card-category or exit charges. Square may still win on flexibility, but “no monthly fee” is not the same as “lowest total cost”.

Transaction count matters online

Square charges UK online cards at 1.4% + 25p. The fixed 25p makes average basket size important.

For 100 orders averaging £20, total sales are £2,000:

• Percentage fee: £2,000 × 1.4% = £28.
• Fixed fees: 100 × 25p = £25.
• Total: £53, an effective rate of 2.65%.

For 20 orders averaging £100, the turnover is still £2,000:

• Percentage fee remains £28.
• Fixed fees: 20 × 25p = £5.
• Total: £33, an effective rate of 1.65%.

A business with small online baskets should never compare the 1.4% percentage in isolation. Use our guide to online payment costs if web checkout is a major part of the decision.

Free versus Plus

Square’s general pricing page says Plus plans start at £29 a month for sector-specific features, while Premium is custom for businesses processing more than £200,000 annually. Paid plans are not simply a cheaper payment rate. Their value usually comes from operational tools.

A retailer should list the manual work a paid plan would remove. If advanced stock controls save three hours a month and that time is worth £15 an hour, the operational value is £45. A £29 plan may pay for itself even if the processing rate does not change.

The reverse also applies. Do not buy a restaurant, retail or appointment package because the demo looks impressive. If the team never uses the extra reports, permissions or workflows, it is another recurring bill.

Payouts and cash flow

Square says standard transfers can reach an external bank account as soon as the next day. Its instant transfer option costs 1.5% and has eligibility and transfer limits.

If a café instantly transfers £2,000 each week, the extra charge is £30 a week, or about £1,560 over 52 weeks. That is a high price for routine cash flow. Keep enough working capital for stock and wages, then reserve instant transfers for a genuine shortfall.

Confirm the actual arrival timetable for weekends and bank holidays. Also ask how refunds, disputes, rolling reserves or account reviews affect available funds. “Next day” is not the same as an unconditional guarantee for every transaction.

Retail, restaurants and appointments

Square has separate products for retail, restaurants and appointment-led businesses. That breadth is useful, but each sector should test its hardest workflow.

A retailer should demonstrate purchase orders, variants, stocktakes, exchanges and transfers between locations. A restaurant should test table plans, coursing, modifiers, split bills, kitchen tickets and delivery orders during a simulated rush. A salon should test deposits, no-shows, staff calendars, service durations and tips.

Do not assume features with similar names work the same way as your existing system. Run a real product import, process a return and export a report before committing hardware across several sites.

Staff, permissions and reporting

The free account includes basic reporting and staff tools, while more advanced access controls and reporting can be paid. This matters once several people share a checkout.

Give each employee an individual login or passcode where possible. A shared manager code makes voids, refunds and discounts hard to investigate. Test whether a supervisor can approve a refund without seeing payroll or sensitive reports.

For accounts, export a sample settlement report and reconcile it to the bank. The daily sales total, processing fee, refunds and net deposit need to be traceable. Ask your bookkeeper whether the export works cleanly with the accounting system you use.

Reliability and support

Square includes customer support and publishes a service-status page. Availability of support routes and hours can depend on the product and issue. Ask how urgent payment problems are escalated and what happens outside normal hours.

Plan for failure. Keep a second internet route, chargers and a written process for cash or payment links. If one Square account powers the counter, online store and invoices, an account or network problem can affect several channels at once.

Offline payments can carry additional risk because approval happens later. Check current limits, expiry and liability rules before using them. Do not treat offline mode as permission to accept any value from any customer.

Contracts, cancellations and data exit

Square’s core POS is pay-as-you-go and its pricing page says plans can be upgraded, downgraded or cancelled. Hardware instalments, third-party apps and connected services can have separate terms.

Before leaving, export products, customers, stock and transaction history. Check how long reports remain accessible after closure and how later chargebacks or refunds are funded. A contract-free processor can still create switching work if all business data sits inside its ecosystem.

Who Square POS suits

Square is a particularly good fit for a market trader, pop-up, mobile service or first shop that wants to start with a £19 reader and free software. Seasonal businesses benefit from avoiding a software bill during quiet months.

It can also suit a growing multi-channel business if Square’s online, invoice and sector tools match the workflow. The attraction is one account and a consistent interface.

It is less obvious for a high-volume, low-margin shop where a negotiated processing rate matters more than free software. It may also be wrong for a complex restaurant or retailer whose essential workflow needs several paid add-ons or third-party apps.

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